EP 0821047 B1 20010530 - A method for controlling fluid loss in permeable formations
Title (en)
A method for controlling fluid loss in permeable formations
Title (de)
Verfahren zur Regulierung des Flüssigkeitsverlustes in durchlässigen Formationen
Title (fr)
Méthode de régulation des pertes en fluide dans les formations perméables
Publication
Application
Priority
US 68531596 A 19960723
Abstract (en)
[origin: US5680900A] The present invention provides a method of controlling fluid loss to a permeable formation penetrated by a wellbore. A novel fluid loss agent is prepared by forming a crosslinked polymer gel which then is sheared to break the gel into discrete particles of a particular size range. A slurry then is formed of the particles by dispersing the particles in an aqueous fluid having a density similar to that of the gel particles. The slurry then is introduced into contact with the permeable formation and a filter cake of the particles is formed upon contact with the formation and loss of the slurrying fluid to the formation. The filter cake provides further fluid loss control to the permeable formation.
IPC 1-7
IPC 8 full level
C09K 8/512 (2006.01); C09K 8/575 (2006.01)
CPC (source: EP US)
C09K 8/512 (2013.01 - EP US); C09K 8/5756 (2013.01 - EP US); Y10S 507/903 (2013.01 - EP US)
Designated contracting state (EPC)
DE DK FR GB IT NL
DOCDB simple family (publication)
US 5680900 A 19971028; CA 2211319 A1 19980123; CA 2211319 C 20031230; DE 69704993 D1 20010705; DE 69704993 T2 20010913; DK 0821047 T3 20010806; EP 0821047 A2 19980128; EP 0821047 A3 19990210; EP 0821047 B1 20010530; NO 322743 B1 20061204; NO 973374 D0 19970722; NO 973374 L 19980126
DOCDB simple family (application)
US 68531596 A 19960723; CA 2211319 A 19970722; DE 69704993 T 19970723; DK 97305538 T 19970723; EP 97305538 A 19970723; NO 973374 A 19970722